Hi, I just installed GTA 4, everything went fine but when I actually start the game the graphics are screwed up. It's like fuzzy blue grey is covering everything. My video memory is 781 mb but it says its only 123 mb and that i've exceeded it even when i take everything down the lowest it can go. I don't understand how to fix it, other high graphics games have worked perfectly fine on my computer. What can I do?Thanks